Grindstone attachment.



P. EKMAN.

GRINDSTONE ATTACHMENT.

APPLICATION FILED NOV. 24. 1915.

1,178,002. I Patented Aim: 4, 1916.

.E COLUMBIA PLANOGRAPH $10., WASHINGTON, u. c.

. nn TED STATES PATENT ormon.

PETER EKMAN, O15 GREELEY, COLORADO.

GR INDST ONE ATTACHMENT.

. Specification of Letters Patent. 7 P t t d Ap 4 1916 Application filedNovember 24,1915. Serial No. 63,272.

To all whom it may concern:

Be it known that I, PETER EKMAN, a citizen of the United States,residing at Greeley, in the county of Weld, State of Colorado, haveinvented a new and'useful Grindsto-ne Attachment; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates 'to an improved grindstone attachment, and aimsto provide a tool holder, that is capable of adjustment, so that thetool may be held in order toaccommodate itself to different sizedgrindstones, and also permit, the operator to move the tool verticallyand laterally in opposite directions. I V v 7 Another object of theinvention is to pro vide a frame having an angular arm consisting ofadjustable sections so that the tool may be held upon various angles,while grinding the same. The sections of the arm are provided with meansadapted to be set up or adjusted for holding the sections in differentpositions.

In practical fields the details of construction may necessitatealterations, falling within the scope of what is claimed.

The invention comprises further'features and combination of parts, ashereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a view in perspective of a grindstone frameand the grindsto-ne therein, showing the grindstone attachment or toolholder as applied. Fig. 2 is an enlarged detail sectional view of aportion of the angular sectional arm, showing the ball and socket oruniversal joint between the tool clamp and one of the sections of saidarm. Fig. 3 is a view partly in elevation and partly in section of theframe for supporting said sectional angular arm.

Referring more especially to the drawings, l designates the grindstoneframe having supporting legs 2, and the grindstone 3 mounted upon theshaft 4,, which is in turn mounted in bearings 5 on the frame. One endof the shaft 4 is provided with a crank and handle 6, whereby revolublemovement may be imparted to the shaft and grindstone. A rectangularframe 7 is provided consisting of the tubular bars 8, 9, 10, and 11. Thelower end of the tube 9 and one end of the tube 10 are connected by theelbow 12. The upper end of the tube 9 and one end of the tube 8 areconnectedby the T unioii The upper end of the tube 11 and'one end ofthetube S- are connected by the elbow .14, whereas the lower end of thetube lland the end 15 of the tube'lO are connected by the T? union 16. Aplate'17 is secured by'screws 18 to the upper face of one corner of theframe 1. This plate '17 has an upwardly extending projection 19, whichextends into the T-union 16, so as to swivelly mountthe' rectangularframe7. However, by setting up on the thumb screw 20, the T-union 16 maybe adjustably tightened on the projection 19, so as to hold the frame 7in. adjusted fixed positions. 1

An angular arm 21 is provided, which consists of two sections 22 and 23.One end .of the section 22 has a head 24,, and surrounding. the head tothe collar or sleeve 25, which has threaded connections with thethreaded enlargement 26 of the section 23, so that by screwing up on thesleeve or colangles to the horizontal plane of the part 27; The part 29of the section 21 of said angular arm telescopically fits into the T-union 13 so that it may be moved swivelly, thereby permitting theangular arm to swivel upon the frame 7, which in turn may swivel uponthe projection 19. By setting up or tightening the'thumb screw 32, the

part 29 maybe held tight and against movev ment in the T-union 13,thereby holding the angular arm in ad usted positions. The section 23 atone end terminates in an integral angular plate 33, upon oneface ofwhich a partial spherical depression, pocket or bear-.

ing 3% is formed. A plate 35 is secured to the enlarged end 36 of theplate 33 by the set screw 37. The plate 35 upon one face has a pair ofpins 38 engaging the recesses or bores 39, so as to hold the plate 35registered with the plate 33. The inner face of the plate 35 has apartial spherical hearing or depression 40, which is directly oppositethe depression or bearing 34, so that the two hearings will cooperateagainst the opposite portions of the ball or spherical member 41 of theshank 42 of the tool'clamp 43. The plates 33 and 35 are drawn tightagainst consists of the two parts 44 and 45' secured together by the setscrew 46, so as to hold the tool, more especially a sickle or scytheblade 47 in the angular recess 48 of the part 44, so as to allow thecutting edge to be held in the proper position adjacent the grindragsurface of the grindstbne. It is to be noted that the blade clamp may bemoved universally, for instance vertically and laterally, so that thetool, blade may be moved to different angles relative to the grindingsurface. Furthermore, the. angular arm may be adjusted toward and fromthe grindstone, on its swivel connection in the T- union 13,701 theframe 7 may be adjusted swivellyfu'pon the projection 19, so that theentireangula'r arm and the clamp may be movedtoward and from thegrinding surface of the grindstone. Furthermore, the section 23 of theangular arm may be adjusted swivelly, so as to change the angle of thecutting blade or 6001.

spherical member or bore at oneend seated in said spherical bearings,whereby the tool may be moved vertically and horizontally relative tothe grinding surface of the grindstone.

In testimony whereof I h Signed y, i Pecificatio'n in the presence ofname to two subscribing Witnesses.

PETER EKMAN.

Witnesses Jone? 13.,Gorrnmnnr, J. B. Panties,

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of ietnts; Washington, D. G.

